Sanding roller



une 7 1927. 1631798 J ca. H. DAVOL SANDING BOLLER Filed July 6,4925 2 Sheets-Sheet 1 II II 2 I WITNESSES ATTORNEYS June '7, 1927.

G. H. DAVOL SANDING ROLLER Filed July 6, 1925 2 Sheets-Sheet 2 INVENTOR a. ff-flavoL Jgwu Y6 ATTORNEYS Patented June 7, 1927.

UNITED STATES PATENT OFFICE.

GEORGE HOWARD DA VOL, OF NEW YORK, N. Y.

SANDING Application filed July 6,

finish the same in a desired way.

Another object of the invention is to provide a roller which may receive sheet members for use in finishing articles, the structure being such that the sheet member is first grasped andthen tightened so as to snugly fit the roller during the operation of the roller.

A still further object of the invention is to provide a roller [which isadapted to be rapidlyrotated when in operation, the'construction being such that sandpaper or other material may be mounted thereon and pulled tightly in place through the useofa pair ,of rotatable gripping members which will'n'ot only pinch the ends of the sandpaper butv will also pull adjacent edges of the sandpaper to cause the sandpaper to snugly fit the roller and thereby present a tight even surface.

In the accompanying drawings- I Figure 1 is an elevation of a roller, dls closing an embodiment of the invention.

Figure 2 is a sectional view through Fig ure 1 on line 22, the same beingon an en-v larged scale.

Figure 3 is a sectional view through Figure 2 on line 3-3.

Figure 4 is a sectional view through Fig ure 2 on line 4 4.

Figure 5 is a sectional view through Figure 2 on line 55.

Figure 6 is an enlarged longitudinal sec tional view through turning and locking. mechanism embodying certain features of the invention.

Figure 7 is an enlarged fragmentary sec tional view through Figure '1, approximately on line 7--7, the same showing how the parts are positioned when the sandpaper or other. article ,is first applied.

Figure 8 is a view similar to Figurc7 but showing the gripping members in gripping position with the parts rotated for pulling the sandpaper tightly against the roller.

Figure 9 is an elevation of a modified ROLLER. I

1925. Serial 1% 41,820.

form of clamping structure to that shown in Figure 6. i

Figure 10 is a sectional view through Figure 9 on line 1010.

Figure 11 is a sectional view through Figure 9 on line 11-11, g I

Referring to the accompanying drawing by numerals, 1 indicates a shaft of any desired kind, preferably provided with a tapering end 2 whereby it may be fitted into a chuck or other device for rotating the roller 3. The roller 3 is provided' with a body 4 preferably of wood and' with cup-shaped end .members 5 and 6. These end members are preferably made from metal and are held in placeby screws or other suitable means. Covering plates 7 and 8 are provided for the end members 5 and 6, said covering plates being provided with apertures 9, and The shaft 1 is provided with an enlargement orcollar 1 1 near one end and with a nut 12 a the opposite end.', Whenever nut 12 is screwed'down tightit will cause the end plates or covering members 7 and 8 tobe firmly clamped against theend mem'bers 5 and 6 whereby upon the rotation of the shaft 1 1 the entire roller 3 will bevrotated. Preferably the contact between plates 7 ,and 8 and the respective ends,5 and 6 is such that one part will be driven by theother through the action of friction though if desired, fastening 'means could be provided and also if desired, a key or other fastening means could be provided for connecting shaft 1 with body 1; V

- Asindicated particularly in Figure 4, the body 4 is provided with a-bore 13- through which the shaft 1 extends, a bore 14 through which the clamping structure 15 extends and a slot 16 for permitting-the insertion of the ends of sandpaper or other desired member 17 asshown in Figures 7 and 8. In order to provide a somewhatyieldmg surface, a

-covering4 of felt. or other desired material is mounted on the body 4 and secured thereto by any suitable form'of adhesive, said covering stopping attheslot 16 where by the same isleft completely exposed for its full length as shown in Figure 1. This .slot is preferably the full length of the body 4 but does not extend through the end members 5 and 6.

I 1As shown in Figure 4, the clamping strun vkeyed thereto. able gripplng j polishing or butling surface according to the .character of the member 17 The clamping structure 15 is provided with a tubular shell or casing 18 and removable end members 19 and 20, said end members being held in place by suitable screws. The end member 20 is provided with a ratchet wheel 21 which may be integral therewith or may be made separate and rigidly secured thereto. Each of the end members is provided with a bore accommodating the shaft 22, which shaft adjacent the end member 19 is provided with a squared portion 23 for receiving the thumb member 24, said thumb member being adapted to be held in position by friction. A pair of cams or eccentrics 25 and 26 are rigidly secured to the shaft 22 in any desired manner, as for instance, by being soldered or These cams act on the mov aw 27, which gripping jaw .co-ac'ts with a stationary gripping jaw 28 secured to the shell 18 in any suitable man her, as for instance, by the screws 29." The 7' l stationary jaw 28 is provided with a number of longitudinally arranged teeth or raised portions 30, 31 and 32 while the movable jaw 27 is provided with two raised portions 33' and 34, said last mentioned raised por tion fitting into the space between the raised portions of the stationary jaw whereby the jaws may firmly grip the end portions 35 and 36 of the member 17 as shown in Figure 8. The ends of member 17 are inserted as shown in Figure 7 and then the shaft 22 turned until the jaws are closed as shown in Figure 6. After this has. been done, the

shell 18 and associated parts are rotated by placing a key or other instrument on the squared end 37 of the end member 20 and then causing a rotation. of the parts until member 17 is as tight as desired. If preferred, the end 37 may be provided with a kerf for receiving a screw driver.

In order that the jaws 27 and 28 may be opened whenever it is desired to insert the ends of member 17 or to remove member 17 springs 38 and 39 are providedand preferably secured in any desired manner to the stationary jaw 28 with one end pressing against jaw 27 in such a direction as to cause'the jaws to move apart. Pins 40 and 41 are provided t'o' guide jaw 27 in its back and forth movement. By this construction and arrangement, whenever the cams 25and 2 6 are moved tothe position shown in Figure 7 the springs 38 and 39 will move the jaws to an open position. When shaft 22 is rotated until the cams are in the position shown in Figures 6 and'8, the movable jaws will be moved to a closed position against the action of springs 38 and 39. Inorder that the casingj18 may be of minimum size, the same is cut away at 25 and. 26 in order toperinit the cams 25 and 26 to swing through the casing when the jaws are to be opened.

It will be readily seen from Figure .8 that the bore 14 is of ample size to receive part of "he ends 35 and 36 as they, are woundaround the casing 18. In order to prevent the easing 18 from unwinding or a reverse movement, aratchet wheel 21 co-acts with a spring pressed pawl 42 carried'by the end member 6. A swinging release member43-is carried by the end 6. and is provided with akerf 44 for receiving a screw driver whereby member 43 may be turned to move the pawl 42 to an open position against the action of spring 45. This will permit the ratchet wheel 21 and associated parts to rotate in a reverse direction and thereby permit the ends 35 and 36 to be readily removed.-.

Figures9, 10 and 11 disclose a modified construction wherein the casing 18 iselimt nated and the body is made into. two parts,

namely, sections "46 and 47. The section 46 groove'48 adapted to receive the longitudinally positioned tooth or bead49 formed on the section 47. In addition, section 47' is provided with a bore 50 adapted to accommodate therod51 which acts as an eccentric or cam. In order to cause the rod 51-to function in this manner, shaft. 22 is eccentrically mounted in the rod or cam 51 and extends beyond each end thereof so that one end is journaled in the bar 52 and part of theendj 20 while the opposite end is journaled in the bar 53 and the end 19. By reason of this construction, whenever the shaft 22" is rotated, cam 51 will be rotated and thereby cause the section 47 tomove, toward or from section 46 for clamping or releasing member 17. After the ends of member 17 have been gripped, the entire structure may be rotated as in the preferred form so as to tighten the member 17' on the i tionary and the other movable, a looped and through the respective apertures for spring carried by said jaws at each end, said guiding the movable jaW and the springs 10 springs acting to force the movable jaw as they function, and a manually actuated from the stationary jaW, each of said springs rotatable cam for causing the movable jaw having a slot, said movable jaw having an to be closed against the action of said aperture adjacent each of said slots, a pin springs.

carried by the stationary jaw at each end and extending through the respective slots GEORGE HOWARD DAVOL' 

